Spectral cut-off in the efficiency of the resistive state formation caused by absorption of a single-photon in current-carrying superconducting nano-strips

We have studied supercurrent-assisted formation of the resistive state in nano-structured disordered superconducting Nb(N) films after absorption of a single optical to near-infrared photon. The efficiency of the resistive state formation has a pronounced spectral cut-off; corresponding threshold ph...

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Bibliographic Details
Published in:The European physical journal. B, Condensed matter physics Condensed matter physics, 2005-10, Vol.47 (4), p.495-501
Main Authors: SEMENOV, A, ENGEL, A, HÜBERS, H.-W, IL'IN, K, SIEGEL, M
Format: Article
Language:English
Subjects:
Absorption
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Mesoscopic and nanoscale systems
Photons
Physics
Superconducting films and low-dimensional structures
Superconductivity
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Summary:We have studied supercurrent-assisted formation of the resistive state in nano-structured disordered superconducting Nb(N) films after absorption of a single optical to near-infrared photon. The efficiency of the resistive state formation has a pronounced spectral cut-off; corresponding threshold photon energy decreases with the bias current. Analysis of the experimental data in the framework of the refined hot-spot model suggests that the quantum yield for near-infrared photons increases with the photon energy. Relaxation of the resistive state depends on the photon energy making the phenomena feasible for the development of energy resolving single-photon detectors.
ISSN:1434-6028
1434-6036
DOI:10.1140/epjb/e2005-00351-8